Tool for analyzing access logs for Amazon Elastic Load Balancing.

Initially developed for processing ipinfo.io access logs.

elblog interval interval [command options] [arguments...]

The command interval outputs the log entries for the specified duration before now.

If --hour flag was specified, the output will contain log entries for the previous hour.

Specifying the --day flag will display the log entries since the day before now.

To output the log entries for the custom duration, use --duration flag with the custom duration value.

The value for the --duration flug must conform the input for the time.ParseDuration() Go function.

A duration string is a possibly signed sequence of decimal numbers, each with optional fraction and a unit suffix, such as "300ms", "-1.5h" or "2h45m". Valid time units are "ns", "us" (or "µs"), "ms", "s", "m", "h".

NOTE: Global flags '--csv' and '--template' are ignored by the 'interval' command.

elblog request-param [command options] [arguments...]

The command request-param outputs the list of different request parameter's values along with the total amount of these values in the request path field across the log entries provided.

The required --param flag is used to specify the HTTP request parameter.

If global flag --csv was set, the first column of the output denotes the request parameter value and the second one is the count.

If using global flag '--template', the following data type is sent to the template to execute:

[]map[string]string

The possible map keys are RequestParameterValue and Count.

The example template is the following:

{{range $i, $r := .}}
  {{$i}}. {{$r.RequestParameterValue}} ({{$r.Count}})
{{end}}

See https://golang.org/pkg/text/template/ for the reference.

elblog client-ip [arguments...]

The command client-ip outputs the list of different client IP addresses along with the total amount of requests.

If global flag --csv was set, the first column of the output denotes the IP address and the second one is the count.

If using global flag --template, the following data type is sent to the template to execute:

[]map[string]string

The possible map keys are ClientIp and Count.

The example template is the following:

{{range $i, $r := .}}
  {{$i}}. {{$r.ClientIp}} ({{$r.Count}})
{{end}}

See https://golang.org/pkg/text/template/ for the reference.

elblog status [command options] [arguments...]

The command status outputs the list of different status codes along with the total amount of requests.

By default it displays the backend status codes.

If the --elb flag was added, status codes for Elastic Load Balancing will be outputted.

If global flag --csv was set, the first column of the output denotes status code and the second one is the count.

If using global flag --template, the following data type is sent to the template to execute:

[]map[string]string

The possible map keys are Status and Count.

The example template is the following:

{{range $i, $r := .}}
  {{$i}}. {{$r.Status}} ({{$r.Count}})
{{end}}

See https://golang.org/pkg/text/template/ for the reference.

elblog latency [arguments...]

The command latency outputs some latency statistics data:

• Total amount of requests,
• Minimal processing time,
• Processing time maximum,
• Mean processing time,
• Latency standard deviation,
• Percentile latency stats (p50, p75 and p99).

Processing time is the sum of Request processing time, Backend processing time and Response processing time values and is represented in milliseconds.

If global flag --csv was set, the first column of the output represents the total amount of requests. The second and the third column show the processing time minimum and maximum respectively. The column number four consists of mean processing time values. Latency standard deviation is stored in the fifth column. The last three columns show the percentile latency stats in the following order: p50, p75 and p99.

If using global flag --template, the following data type is sent to the template to execute:

map[string]string

The possible map keys are: Count, Min, Max, Mean, StandardDeviation, P50, P75 and P99.

The example template is the following:

The minimum processing time of {{.Count}} requests is {{.Min}}

See https://golang.org/pkg/text/template/ for the reference.

To install, use go get:

$ go get github.com/pshevtsov/elblog/cmd/elblog

1. Fork (https://github.com/pshevtsov/elblog/fork)
2. Create a feature branch
3. Commit your changes
4. Rebase your local changes against the master branch
5. Run gofmt -s
6. Create a new Pull Request

Petr Shevtsov

MIT